18553460772 has 96 divisors (see below), whose sum is σ = 54026025984. Its totient is φ = 4814409600.

The previous prime is 18553460767. The next prime is 18553460789. The reversal of 18553460772 is 27706435581.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1000747 + ... + 1019117.

It is an arithmetic number, because the mean of its divisors is an integer number (562771104).

Almost surely, 2^18553460772 is an apocalyptic number.

18553460772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18553460772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27013012992).

18553460772 is an abundant number, since it is smaller than the sum of its proper divisors (35472565212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18553460772 is a wasteful number, since it uses less digits than its factorization.

18553460772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19489 (or 19487 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 18553460772 in words is "eighteen billion, five hundred fifty-three million, four hundred sixty thousand, seven hundred seventy-two".